Ocean biogeochemical models still have a very crude parameterization of bacterial dynamics. Some models consider a mechanistic degradation of particulate organic matter depending on its quality (nutrient content) by free-living bacteria, and other models have an implicit linear or non-linear degradation, which implies that all bacteria are attached to particles. As far as I know nobody has considered both attached and free-living bacteria but I may be wrong
thanks in advance
Hi Marcello,
I am also not aware of a 3D global biogeochemical model that has attached and free-living bacteria. But here is a 1d model that does it:
Mislan, K. A. S., et al. "Group behavior among model bacteria influences particulate carbon remineralization depths." Journal of Marine Research 72.3 (2014): 183-218.
Best!
Charlotte
Hello Marcello,
some bacterial groups are very dynamic and can change their relationship between free -living or attached.
This changes may depends on predations, food quality, salinity, light, xenobiotic compounds input, type of organic matter, etc.
But, its very interesting to bacterial groups to be attached to some substrate or mineral particle, because it's more easy to them to join different kind of bacterial groups (quorum sensing)
Charlotte Laufkötter,
Do you have this paper ("Group behavior among model bacteria influences particulate carbon remineralization depths.") that you talk?
I can`t find it. Thanks.
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